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  <a name="mysql-0013"></a><a name="mysql-0013"></a>
  <h1 class="topictitle1">安装Percona XtraBackup工具依赖软件</h1>
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   <p>MySQL/GreatSQL在执行备份任务前，需要在MySQL/GreatSQL所有节点手动安装Percona XtraBackup工具依赖软件。</p>
   <div class="section">
    <h4 class="sectiontitle">注意事项</h4>
    <p>备份过程中执行DDL （Data Definition Language）操作会阻塞Percona XtraBackup工具的备份，待DDL 操作完成后，备份才能继续进行。</p>
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    <h4 class="sectiontitle">操作步骤</h4>
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     <li><span>登录MySQL/GreatSQL实例所在的主机。</span></li>
     <li><span>依次执行以下命令，安装Percona XtraBackup工具依赖软件。</span><p></p><pre class="screen">yum install -y perl-DBD-MySQL
yum install -y perl-Digest-MD5
yum install -y perl-DBI
yum install -y perl-Time-HiRes
yum install -y perl-IO-Socket-SSL</pre> <p></p></li>
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     <strong>父主题：</strong> <a href="mysql-0011.html">步骤3：手动安装备份工具</a>
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